Keep the panel node-pack in sync with the orchestrator

The orchestrator (comfyui-mcp, from npm) and the sidebar panel (comfyui-agent-panel on the Comfy Registry, repo comfyui-mcp-panel) ship separately. Updating one does not update the other. A new orchestrator driving an old panel fails in confusing ways, such as a bridge command the panel doesn't implement or a feature that exists in the docs but not in the sidebar, and those failures are hard for a user to diagnose. This skill closes that gap.

The two rules that outrank everything else here

1. Never report a sync that did not happen. This whole feature sits on top of the fabricate-success fixes (#639/#641): ComfyUI-Manager reports its queue "drained" even when it never enqueued anything, and a .bak-style copy in custom_nodes can shadow the real panel in the browser. So the only version you may ever tell the user is the one read back from disk after the fact. If the tool throws, the sync FAILED. Say so plainly. Do not soften it, do not retry it into a success, do not report the version you intended to install.